Housing tolerances and resultant fits

Housing
Nominal
bore diameter
Bearing
Outside diameter
tolerance
Housing bore diameter deviations, resultant fits1)
Tolerance classes
D tΔDmp N6Ⓔ N7Ⓔ P6Ⓔ P7Ⓔ


Deviations (housing bore diameter)


Theoretical interference (–)/clearance (+)
over incl. low high Probable interference (–)/clearance (+)
mm µm µm












6 10 0 –8 –16 –7 –19 –4 –21 –12 –24 –9




–16 +1 –19 +4 –21 –4 –24 –1




–14 –1 –16 +1 –19 –6 –21 –4












10 18 0 –8 –20 –9 –23 –5 –26 –15 –29 –11




–20 –1 –23 +3 –26 –7 –29 –3




–18 –3 –20 0 –24 –9 –26 –6












18 30 0 –9 –24 –11 –28 –7 –31 –18 –35 –14




–24 –2 –28 +2 –31 –9 –35 –5




–21 –5 –25 –1 –28 –12 –32 –8












30 50 0 –11 –28 –12 –33 –8 –37 –21 –42 –17




–28 –1 –33 +3 –37 –10 –42 –6




–25 –4 –29 –1 –34 –13 –38 –10












50 80 0 –13 –33 –14 –39 –9 –45 –26 –51 –21




–33 –1 –39 +4 –45 –13 –51 –8




–29 –5 –34 –1 –41 –17 –46 –13












80 120 0 –15 –38 –16 –45 –10 –52 –30 –59 –24




–38 –1 –45 +5 –52 –15 –59 –9




–33 –6 –40 0 –47 –20 –54 –14












120 150 0 –18 –45 –20 –52 –12 –61 –36 –68 –28




–45 –2 –52 +6 –61 –18 –68 –10




–39 –8 –45 –1 –55 –24 –61 –17












150 180 0 –25 –45 –20 –52 –12 –61 –36 –68 –28




–45 +5 –52 +13 –61 –11 –68 –3




–38 –2 –44 +5 –54 –18 –60 –11












180 250 0 –30 –51 –22 –60 –14 –70 –41 –79 –33




–51 +8 –60 +16 –70 –11 –79 –3




–43 0 –50 +6 –62 –19 –69 –13












250 315 0 –35 –57 –25 –66 –14 –79 –47 –88 –36




–57 +10 –66 +21 –79 –12 –88 –1




–48 +1 –54 +9 –70 –21 –76 –13












315 400 0 –40 –62 –26 –73 –16 –87 –51 –98 –41




–62 +14 –73 +24 –87 –11 –98 –1




–51 +3 –60 +11 –76 –22 –85 –14












400 500 0 –45 –67 –27 –80 –17 –95 –55 –108 –45




–67 +18 –80 +28 –95 –10 –108 0




–55 +6 –65 +13 –83 –22 –93 –15












500 630 0 –50 –88 –44 –114 –44 –122 –78 –148 –78




–88 +6 –114 +6 –122 –28 –148 –28




–75 –7 –98 –10 –109 –41 –132 –44












630 800 0 –75 –100 –50 –130 –50 –138 –88 –168 –88




–100 +25 –130 +25 –138 –13 –168 –13




–83 +8 –108 +3 –121 –30 –146 –35












800 1 000 0 –100 –112 –56 –146 –56 –156 –100 –190 –100




–112 +44 –146 +44 –156 0 –190 0




–92 +24 –119 +17 –136 –20 –163 –27












1 000 1 250 0 –125 –132 –66 –171 –66 –186 –120 –225 –120




–132 +59 –171 +59 –186 +5 –225 +5




–108 +35 –138 +26 –162 –19 –192 –28












1 250 1 600 0 –160 –156 –78 –203 –78 –218 –140 –265 –140




–156 +82 –203 +82 –218 +20 –265 +20




–126 +52 –163 +42 –188 –10 –225 –20












1 600 2 000 0 –200 –184 –92 –242 –92 –262 –170 –320 –170




–184 +108 –242 +108 –262 +30 –320 +30




–149 +73 –192 +58 –227 –5 –270 –20












2 000 2 500 0 –250 –220 –110 –285 –110 –305 –195 –370 –195




–220 +140 –285 +140 –305 +55 –370 +55




–177 +97 –226 +81 –262 +12 –311 –4












  1. 1) Values are valid for most bearings with Normal tolerances. For exceptions, refer to Tolerances and resultant fits.

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